Delhi Accord was a tripartite agreement (verbal) in Delhi after mutual agreement between Ranas, Nepali congress party and King Tribhuban.
This reduced the status of the king to a mere figurehead and vested all powers in the hands of the hereditary prime ministers of the Rana family.
The Rana prime ministers restricted education to just the members of the Rana family and some other aristocrats, executed and imprisoned any objectors and held the royal family captive.
In time, anti-Rana sentiments grew strong among aristocrats who worked with Nepalis living in India to fuel a revolution against the oppressive regime.
King Tribhuvan's anti-Rana attitude had been an open secret for a long time in Nepal.